There are surface similarities to Flappy Bird (the aircraft moves the same way, you find yourself often accidentally tapping one time too many or too few), but beyond that, it is a different strategy. If you play Flappy Bird well, you’ll probably catch on to this sooner though.
Like Flappy Bird, you’ll probably score low and even think the game is super hard. Well, it is a challenge, but now I can get into the hundreds pretty much all the time and over 1000 quite a bit. Got just over 2000 once and my record is over 3064. So stick with it. I still don’t know what the last two Achievements are. Probably number of Zombies killed in a round - all the others are (intervals of 50, 100, 150, 250, 500, 1000, 2500. I’m guessing the next one could be as high as 5000 so I may never get there!